319 results about "Hydrogenation process" patented technology

The invention discloses a Ce-MOF derived multi-metal oxide / ZSM-5-based composite catalyst as well as a preparation method and application thereof, and belongs to the technical field of aviation kerosene preparation. The H-ZSM-5 molecular sieve is synthesized by adopting a hydrothermal method, and Ce-MOF is grown on the surface of the H-ZSM-5 molecular sieve in situ. The high specific surface area, developed pore structure and abundant unsaturated sites of the Ce-MOF material are utilized to realize efficient loading of various active metals. And drying and calcining to obtain the Ce-MOF derived multi-metal oxide / ZSM-5 composite catalyst with a stable structure. Rich oxygen vacancies and active sites can efficiently activate CO2 molecules and promote the hydrogenation process of the CO2 molecules and H2 to generate a key methanol intermediate; accurate carbon chain growth regulation coupling effect can be performed on the methanol intermediate, and the methanol intermediate is quickly and effectively converted. The catalyst prepared by the method provided by the invention has a regular pore structure and suitable acidic sites, and on the basis of the cage control shape selective catalysis principle of the H-ZSM-5 molecular sieve, the per-pass conversion rate of CO2 exceeds 25%, the selectivity of aviation kerosene components in hydrocarbon products reaches 70.5%, and the generation of methane by-products is effectively inhibited.

The invention provides a temperature accurate control and flow state optimization method for replacing dimethyl disulfide with sulfur in a coal tar hydrogenation process, which comprises the following steps: after acquiring a blockage risk distribution diagram, deploying a flow sensor and a pressure sensor at key nodes of a pipeline in combination with real-time monitoring capability, and collecting dynamic data of a sulfur flow state; flow stability parameters are obtained; according to the fluctuation amplitude, adjusted sulfur flow state data are obtained, the flow velocity and viscosity change of sulfur in the pipeline are calculated through fluid mechanics simulation, and the flow state optimization degree is determined; after a process suitability evaluation result is obtained, the operation cost and the economic benefit improvement range of the sulfur substitution scheme are calculated in combination with a cost accounting model, and the cost control effect is judged by comparing the reference cost of dimethyl disulfide; through a cost control effect, a time sequence prediction algorithm is adopted to analyze sustainability of temperature control and flow state optimization in long-term operation, and a comprehensive optimization scheme of production process stability and economy is obtained.

The application provides a continuous hydrogenation-isomerization method capable of meeting the treatment requirements of biological oils, especially waste oils, using a homogeneous hydrogenation process with strong adaptability to raw materials as a raw material pretreatment process, and matching a high-activity nanometer transition metal sulfide catalyst. On this basis, a catalytic distillation process is used for selective cracking of long-chain alkanes to improve the yield of medium and long-chain alkanes; an ultramicro flow hydrogen gas mixer and a reduced non-noble metal hydrogenation-isomerization catalyst are used to reduce the hydrogen / oil ratio and the energy consumption of the circulating hydrogen system, and to reduce the production cost of the catalyst, so as to finally realize efficient and low-carbon conversion of waste oils, and low-cost and high-selectivity preparation of biological aviation kerosene.

A continuous process includes supplying, to a hydrogen production unit, an energy source in the form of mechanical energy or electrical energy produced from thermal energy generated in a hydrogenation process in a hydrogenation reactor unit, and flowing a light hydrocarbon feed stream into the hydrogen production unit in the presence of a catalyst to produce a hydrogen gas enriched stream using the energy source.

The invention discloses an ionic liquid modified supported metal oxide and a preparation method and application thereof, the supported metal oxide takes a metal oxide as a carrier, platinum is supported on the metal oxide, and ionic liquid is electrostatically adsorbed on the metal oxide. According to the invention, the ionic liquid is used as an organic ligand to modify the platinum-loaded metal oxide, and the ionic liquid is used as a catalyst to realize the high activity of generating 1, 2-pentanediol in the selective hydrogenation process of furfuryl alcohol. Specifically, the selectivity of 1, 2-pentanediol can reach 76.8%, and compared with an original platinum-loaded metal oxide catalyst, the activity of the catalyst can be maximally improved by 491.2%.

The invention discloses a high-silicon crude benzene hydrogenation process which comprises the following steps: firstly, separating a raw material crude benzene into a crude benzene component I and a crude benzene component II, sequentially carrying out first-stage hydrogenation on the crude benzene component I to remove unsaturated substances such as styrene and diolefin, and carrying out second-stage hydrogenation on the crude benzene component I to remove silicon-containing compounds and residual unsaturated substances such as styrene and diolefin; and mixing with a crude benzene component II, and carrying out third-stage hydrogenation to remove impurities such as sulfur, nitrogen and the like. According to the distribution of the content of styrene and silicon in the crude benzene, styrene and silicon in the crude benzene are enriched in the crude benzene component I through distillation separation, and the crude benzene component II is removed, so that the hydrogenation styrene removal and hydrogenation desilicication reactions of the crude benzene component I are easier to carry out, meanwhile, the removal of silicon-containing compounds is further promoted through the addition of ethylenediamine, and the yield of the crude benzene is improved. The desiliconization activity and precision of second-stage hydrogenation are improved, and the problem of rapid deactivation of the catalyst caused by silicon poisoning in high-silicon crude benzene hydrogenation is effectively solved.

The invention discloses a hydrogenation catalyst as well as a preparation method and application thereof. The hydrogenation catalyst comprises a carrier and active metal, the carrier is an aluminum oxide core wrapped by a carbon shell, the active metal is Mo and Ni, and on the basis of the weight of the catalyst, the content of MoO3 is 7.5 wt%-15.5 wt%, the content of NiO is 1.5 wt%-4.5 wt%, the content of carbon is 20 wt%-45 wt%, and the content of aluminum oxide is 35 wt%-70 wt%; and the ratio delta 1 of the content of the active metal in the shell layer to the content of the active metal in the core layer is 0.25: 1-0.75: 1. The preparation method comprises the following steps: (1) preparing active metal modified flour; (2) preparing active metal modified pseudo-boehmite microspheres; and (3) rolling the active metal modified flour and the active metal modified pseudo-boehmite microspheres for molding, then carrying out heat treatment, drying and roasting to obtain the hydrogenation catalyst. The catalyst disclosed by the invention has relatively high metal impurity capacity and relatively high Ca, Fe, Ni and V removal capacity, and is suitable for being used as a hydrogenation protection catalyst and a hydrodemetallization catalyst in a residual oil hydrogenation process.

The utility model belongs to the technical field of coal tar hydrogenation process, and relates to a sealing gas conveying system for sealing a circulating hydrogen compressor, which comprises a conveying pipeline and heating equipment, the conveying pipeline is connected with the outlet end of the compressor and used for conveying sealing gas. The heating device is arranged on the conveying pipeline and used for heating the sealing gas. According to the utility model, the process gas at the outlet end of the compressor is heated through the additionally arranged heating equipment, so that the process gas can be conveniently heated to the required temperature to serve as sealing gas, the load of the compressor does not need to be increased, unnecessary energy consumption of the compressor is avoided, and in addition, in the actual operation process, the energy consumption is reduced. The load of the compressor can be reduced according to actual process requirements, so that the process gas temperature at the outlet end of the compressor is reduced, and energy conservation and consumption reduction of the compressor are realized.

The invention discloses a cold hydrogenation quench tower energy recovery system and an operation mode, and the system comprises a quench tower, a vaporizer, a first-stage heat exchange system, a second-stage heat exchange system and a circulating water cooler, and layered energy recovery is realized through a three-stage cascade heat exchange structure: a high-temperature liquid-phase material discharged from a quench tower sequentially passes through a second-stage heat exchange system, a first-stage heat exchange system and a circulating water cooler to complete heat exchange, and meanwhile, a heating heat source is provided for silicon tetrachloride and hydrogen. Through the design of multiphase flow enhanced heat transfer, feed gas quality-divided heat exchange and tail liquid recovery, the system significantly improves the energy recovery rate, reduces steam consumption and raw material loss, enhances the operation stability of the system, and is suitable for efficient and energy-saving production of a cold hydrogenation process.

The present application relates to the technical fields of chemical synthesis, and discloses a kind of aviation kerosene production process and equipment, production process includes: carbon source gas, hydrogen, circulating gas is sent into main reactor reaction and obtains including hydrocarbon, methanol, CO, water and unreacted gas mixed component a;Mixed component a is sent into cascade reactor and is prepared to obtain including aviation kerosene component, light hydrocarbon component and water mixed component b, wherein light hydrocarbon component includes one or more of C2-C7 light hydrocarbon;Mixed component b is fractionally condensed to collect liquid phase and gas phase, and liquid phase is carried out three-phase separation to obtain aviation kerosene component, light hydrocarbon component and water respectively, aviation kerosene component is hydrotreated, fractionation to obtain aviation kerosene.The present application realizes the step-by-step control of reaction path in carbon source hydrogenation process through the synergistic effect of main reactor and cascade reactor, improves the selectivity of aviation kerosene target product, so that the obtained product meets the 3# aviation kerosene standard requirements in key indicators such as distillation range distribution, aromatic content and low temperature performance.

According to the multi-construction layered metal oxide and the application thereof in hydro-conversion of the polystyrene waste plastic pyrolytic oil, the prepared multi-construction layered metal oxide serves as a catalyst and is fully mixed with the polystyrene waste plastic pyrolytic oil after being pretreated, and then the mixture is transferred into a reaction kettle; after sealing, filling hydrogen into the reaction kettle, controlling the reaction temperature to be 90-100 DEG C, and stirring to react for 6-12 hours; according to the invention, the multi-constructed NixAl-LDO is combined with the hydrogenation process, and the styrene conversion rate and ethylbenzene selectivity are improved by utilizing the combined action of the structural advantage of the multi-layer catalyst and the hydrogenation reaction.

This invention discloses a method for preparing ultra-high voltage converter transformer oil. The method uses the full fraction of high-temperature and medium-low temperature coal tar as raw material, employing a combined suspended-bed hydrogenation process. Through the same raw material and a single set of industrial equipment, continuous production of transformer oil base oil and aromatic oil is achieved. After the final addition of an antioxidant, the resulting transformer oil exhibits excellent anti-gas evolution properties, and its low-temperature performance and antioxidant properties are significantly superior to commercially available transformer oils. Furthermore, the method demonstrates strong adaptability to raw materials, flexible operation, and online catalyst addition in small quantities, resulting in improved overall performance of the prepared ultra-high voltage converter transformer oil. This invention provides an economical processing method for coal tar, which has relatively low byproduct utilization, and also develops a new raw material for the production of ultra-high voltage converter transformer oil.

The invention discloses a biomass sugar solution steam stripping-hydrogenation device and a biomass sugar hydrogenation process, the biomass sugar solution steam stripping-hydrogenation device comprises: a steam stripping reaction kettle, the top of the steam stripping reaction kettle is provided with a feed pipe, and the bottom of the steam stripping reaction kettle is provided with a hydrogen inlet pipe; the fixed bed hydrogenation reactor is communicated with the steam stripping reaction kettle; the cooler is communicated with the fixed bed hydrogenation reactor; and the gas-liquid separator is communicated with the cooler. According to the present invention, the steam stripping-hydrogenation process coupling is adopted to achieve the in-situ conversion of the heat sensitive saccharide derivative, the problems of difficult separation, easy heating coking and the like of the saccharide derivative are solved, and the hydrogen circulation, the heat coupling and the integration of the process process are provided to provide the continuous, high-selectivity and low-energy-efficiency new process for preparing the biomass energy and the chemical product.

The invention discloses a hydrogenation catalyst as well as a preparation method and application thereof. The hydrogenation catalyst comprises a carrier and active metal components, the carrier is a core-shell carrier, a core layer is alumina, a shell layer is alumina containing molybdenum carbide, and the active metal components comprise at least one of VIII group metal oxides and at least one of VIB group metal oxides. The catalyst can be used for hydrogenation of heavy oil, residual oil and the like, is especially suitable for a residual oil hydrogenation process, and realizes efficient hydrogenation.

This invention discloses a method for hydrotreating catalytic cracking slurry. A fixed-bed hydrotreating process is employed, comprising: in the presence of hydrogen, the catalytic cracking slurry sequentially contacts a hydrotreating protectant, a hydrotreating transition catalyst, and a hydrodesulfurization catalyst to undergo a hydrotreating reaction, yielding hydrotreated oil. The hydrotreating protectant comprises an alumina support with a most probable pore size of 40–100 nm, molybdenum oxide, and cobalt oxide. The hydrotreating transition catalyst comprises an alumina support containing additives and MoO3 and CoO. The support has a bimodal pore size distribution, with smaller pores concentrated in the 10–40 nm range and larger pores concentrated in the 150–400 nm range. This method eliminates the diffusion resistance during the adsorption and reaction of large molecules on the catalyst surface during the hydrotreating of catalytic cracking slurry, increases the capacity for more deposits such as coke, extends the operating cycle of the unit, and facilitates hydrodesulfurization and other reactions. It also increases the content of tricyclic and tetracyclic aromatics in the hydrotreated oil, making it a high-quality feedstock for needle coke production.

This invention relates to the field of SEBS preparation, specifically to a method for predicting the degree of hydrogenation of SEBS. The method utilizes the designed values ​​of the amount m of the main catalyst, the lithium / main catalyst molar ratio n, and the co-catalyst / main catalyst molar ratio X in the selective hydrogenation process of SBS gel polymerized by active lithium anion polymerization and the main catalyst and co-catalyst. Formulas 1 to 9 are then used to calculate and predict the degree of hydrogenation Y of the prepared SEBS. Formula 1: Y = 0.12 + 0.88 * X, Formula 2: Y = 0.19 + 0.81 * X, Formula 3: Y = 0.25 + 0.75 * X, Formula 4: Y = 0.17 + 0.83 * X, Formula 5: Y = 0.25 + 0.75 * X, Formula 6: Y = 0.31 + 0.69 * X, Formula 7: Y = 0.2 + 0.8 * X, Formula 8: Y = 0.32 + 0.68 * X, Formula 9: Y = 0.4 + 0.6 * X. This invention also includes a synthesis method for precisely controlling the degree of hydrogenation of SEBS using the aforementioned prediction method. The process described in this invention can predict the degree of hydrogenation of SEBS with high accuracy.

This invention relates to the field of rubber hydrogenation, and discloses a stirred tank reactor and its application in rubber hydrogenation, as well as a batch hydrogenation method for nitrile rubber. The stirred tank reactor includes a cylindrical body and a stirrer and hollow finger-shaped baffles placed inside the body. The stirrer includes a hollow stirring shaft and a stirring paddle mounted on the shaft. A hydrogen inlet is located at the top of the hollow stirring shaft, and an annular gas distributor is located at the bottom. The hollow finger-shaped baffles include a hollow straight tube and at least two short, downward-sloping straight tubes arranged along the bottom of the tube. The bottom of the hollow straight tube is connected to a hydrogen inlet pipe at the bottom of the cylindrical body. The multiple hollow finger-shaped baffles within the stirred tank reactor enable good dispersion and mixing of hydrogen in the rubber solution, and, together with the hollow stirring shaft and gas distributor, achieve a top-to-bottom self-circulation of hydrogen in the gas phase space within the reactor, thereby improving the hydrogenation efficiency of the rubber hydrogenation reaction.

The application provides a continuous palladium-carbon hydrogenation reaction method, which is carried out according to the following steps: step one, mixing carbon catalyst with a solvent, and then injecting into the inside of a reactor; step two, connecting and starting a circulating pump to make the inside catalyst partially flow in a circulating mode; step three, injecting p-nitrotoluene and hydrogen, and carrying out heat exchange treatment on the whole reactor through a heat exchanger to keep the temperature stable during the reaction; and step four, discharging the reaction liquid and carrying out filtration treatment. The continuous palladium-carbon hydrogenation reaction method and equipment optimize the catalytic effect of the catalyst, improve the filtration efficiency, ensure that the raw material liquid and hydrogen enter the reactor, make the catalyst freely flow in the whole reaction area without being discharged from the reactor, continuously remove the product from the reactor, keep the temperature stable during the whole reaction process through the heat exchanger, and automatically stir the inside through the hydrogen injection.

The utility model relates to the technical field of hydrogenation processes, in particular to a heating device for a hydrogenation process. According to the technical scheme, the device comprises a box body, a threaded disc and a threaded ring, a threaded groove is formed in the upper surface of the box body, a circular groove is formed in the bottom end of the inner wall of the threaded groove, a heating strip is installed on the inner wall of the circular groove, a limiting ring is fixed to the bottom end of the circular groove, a reactor is placed on the limiting ring, and the threaded disc extends into the threaded groove to be in threaded connection with the threaded groove. A fixing disc is fixed to the lower surface of the threaded disc, a spring is fixed to the lower surface of the fixing disc, a pressing disc is fixed to the bottom end of the spring, a limiting frame is installed on the lower surface of the pressing disc, the lower surface of the pressing disc is attached to the upper surface of the reactor, and the upper end of the reactor is inserted into the limiting frame. The reactor disclosed by the utility model has the advantages that the reactor can be conveniently mounted and dismounted, the reactor can be conveniently heated, and the reaction efficiency of a hydrogenation process is improved.

The invention belongs to the technical field of hydrogenation modification of low-rank coal, and particularly relates to a method for coal blending coking through non-catalytic hydrogenation modification tackifying of low-rank coal. In order to solve the problems that the low-rank coal mixing hydrogenation process is complex, a catalyst is difficult to recycle and the like, the method comprises the following steps: weighing low-rank coal and a hydrogen-donor solvent according to different mass proportions, carrying out hydrogenation reaction according to different reaction temperatures, reaction pressures and reaction time of an autoclave, firstly, fully stirring and uniformly mixing the materials in the autoclave, and then carrying out heating reaction; and after the autoclave is cooled, directly carrying out suction filtration separation on the reaction mixture to obtain a solid product which is the modified coal with a certain caking index.

The invention belongs to the technical field of cold hydrogenation synthesis, and particularly relates to a treatment method of slag slurry generated in a cold hydrogenation synthesis process, the slag slurry generated in the cold hydrogenation process is sequentially subjected to primary filtration, secondary diatomite precoating filtration, drying evaporation and rectification purification treatment, so that the recovery rate of chlorosilane (mainly silicon tetrachloride) is up to 99%, and the recovery rate of chlorosilane is up to 99%. Resource waste and environmental pollution are avoided, meanwhile, an alkali washing tank is omitted, the process is simplified, and energy consumption is reduced; in addition, physical separation (filtration, drying and rectification) and solid slag neutralization are adopted in the treatment method, no wastewater is generated, a matched sewage treatment system is not needed, and the environmental protection cost and energy consumption are remarkably reduced.

This invention provides a titanium-aluminum composite support and its preparation method, a hydrogenation catalyst, and a hydrogenation catalyst for heavy petroleum distillate oil. The preparation method of the titanium-aluminum composite support includes mixing a mixture of an aluminum source, a titanium source, and a template agent with a mixture of water, alcohol, and acid to obtain a wet gel; subjecting the wet gel to supercritical CO2 drying and calcination to obtain the titanium-aluminum composite support. This invention also provides a hydrogenation catalyst made from the above-mentioned titanium-aluminum composite support. Furthermore, this invention provides a hydrogenation catalyst for heavy petroleum distillate oil comprising the above-mentioned hydrogenation catalyst. The above-mentioned titanium-aluminum composite support has a mesoporous structure with a concentrated pore size distribution, and the hydrogenation catalyst made from this titanium-aluminum composite support exhibits high denitrification activity in the hydrogenation process of coking wax oil.

This invention relates to the field of methanol production technology. It discloses a methanol production method and system based on ethanol production off-gas, comprising: Step S1: Off-gas from the ethanol carbonylation process is fed to the methanol washing process to obtain CO supplementary washing gas; Step S2: Off-gas from the ethanol hydrogenation process is fed to the methanol washing process to obtain H2 supplementary washing gas; Step S3: CO supplementary washing gas and H2 supplementary washing gas are mixed and fed, and the hydrogen-to-carbon ratio in the mixed washing gas is controlled between 1.8 and 1.9 by gas collection and detection combined with diversion flow control. Ethanol off-gas is used as the main supplementary gas for methanol production feedstock. The combination of off-gas from the ethanol carbonylation process and off-gas from the ethanol hydrogenation process forms a hydrogen-to-carbon ratio closer to that of methanol feedstock gas. After methanol washing, a feedstock gas containing mainly CO and H2, with a small amount of CO2 as a secondary component, is formed, making the methanol system more stable.

The utility model relates to the technical field of polycrystalline silicon production, and provides a quench tower and a cold hydrogenation process treatment system. The quench tower comprises a tower body and is provided with an air inlet, and the air inlet is close to the tower bottom of the tower body. And the N tower trays are arranged in the tower body and are positioned above the air inlet, and a plurality of air holes are distributed on the tower trays. And the tower trays are sequentially arranged from low to high along the height direction of the tower body. When the number n tower tray is smaller than or equal to m, the apertures of the air holes in the tower trays from low to high are sequentially reduced along the height direction of the tower body; when the number n tower tray is greater than or equal to m, the hole diameters of the air holes in the tower trays are equal; wherein N and m are any positive integers greater than 3. By setting the aperture of the air hole, the step-by-step separation of solid impurities carried in the gas can be realized, so that the fault-tolerant rate of the operation adjustment of the quench tower is increased and the operation stability is improved while the blockage probability of the tray of the quench tower is reduced.

The invention discloses a hydrogenation method for preparing octadecane and co-producing hexadecane from stearic acid. A raw material containing stearic acid and hydrogen sequentially pass through a fixed bed reactor containing a stearic acid hydrogenation catalyst A and a stearic acid hydrogenation catalyst B together for hydrogenation reaction, and reaction products are separated to finally obtain octadecane and hexadecane. The surface active site density of nickel in the hydrogenation catalyst A is large, and active metal is dispersed more uniformly; and the binding energy between the active metal of B and the carrier in the hydrogenation catalyst is moderate, so that the hydrogenation catalyst has better water resistance. The method provided by the invention improves the conversion rate of stearic acid, reduces the occurrence of side reactions, and has a longer operation period.

The invention discloses a preparation method of a gasoline selective hydrogenation catalyst, which comprises the following steps: (1) adding a niobium-containing precursor into bottom water of a reactor, adding an aluminum salt solution and a precipitant in a parallel flow manner, carrying out gelling reaction, pulping molybdenum trioxide after gelling, carrying out aging reaction, and washing, filtering and drying an aging product to obtain modified alumina dry glue powder; (2) uniformly mixing the modified alumina dry glue powder, a peptizing agent and an extrusion aid, carrying out extrusion molding, drying and roasting to obtain a carrier, and carrying out vulcanization treatment; (3) carrying out saturated impregnation on the carrier vulcanized in the step (2) by using liquid olefin, and then carrying out closed heat treatment under a CO2 atmosphere condition with a certain concentration; and (4) impregnating the heat-treated material obtained in the step (3) with an impregnation liquid containing active metal Co, drying, roasting and vulcanizing to obtain the hydrodesulfurization catalyst. The catalyst disclosed by the invention has relatively high desulfurization activity and selectivity when being applied to a gasoline selective hydrogenation process.

The invention discloses a polymer hydrogenation method, a catalyst and a preparation method of the catalyst. The hydrogenation method of the polymer comprises the following steps: carrying out hydrogenation reaction on the polymer and hydrogen under the action of a catalyst, the catalyst comprises Ni and a first non-metallic element; and the catalyst particles have nano-particle sizes. In the polymer hydrogenation method, the catalyst is high in activity, long in service life and low in polymer chain scission rate.

A continuous process includes supplying, to a hydrogen production unit, an energy source in the form of mechanical energy or electrical energy produced from thermal energy generated in a hydrogenation process in a hydrogenation reactor unit, and flowing a light hydrocarbon feed stream into the hydrogen production unit in the presence of a catalyst to produce a hydrogen gas enriched stream using the energy source.

The application provides a preparation method and product of 1,3-propanediol. The preparation method comprises the following steps: subjecting 3-hydroxypropionaldehyde aqueous solution to a first-stage hydrogenation reaction under the action of a first-stage hydrogenation catalyst to obtain a first-stage hydrogenation reaction product; and subjecting the first-stage hydrogenation reaction product to a second-stage reaction under the action of a second-stage hydrogenation catalyst to obtain a 1,3-propanediol product. The preparation method adopts two-stage hydrogenation, effectively improves the economy of the propenal hydration hydrogenation process, and solves the problems that the impurities generated in the 1,3-propanediol preparation route of the propenal hydration process are difficult to treat and resource utilization.